If "Fringe" fans thought Peter Bishop's
disappearance was clever, producers Jeff Pinkner and J.H. Wyman promise his
reappearance will be just as imaginative.

BTS wondered, though, what was more challenging for
the dynamic duo: erasing Peter or figuring out a way to bring him back?

"They both had their challenges," Pinkner says. "I
think that figuring out the way to make him disappear was pretty simple. It's
sort of like, 'Oh, now he's gone.' Coming up with the context of his return has
been super fun and hopefully the payoff will be really rewarding. We think it
is.

"And then, as always ... we're always far more
interested in answering questions and then playing the consequences. And,
hopefully, the consequences of his return will sort of give us an engine for a
good part of the season."

Wyman promises fans that, as the episodes roll out,
"you'll understand a little bit more about the reasons why and how we did what
we did. So, it will become clear. The future of our storytelling sort of
dictated how Peter was going to disappear and then come back. So, it'll put
more in context for you as you see more."